Products having a wood grain appearance, and methods and structures for use in forming same

ABSTRACT

Structures for use in forming products having a wood grain appearance include, for example, a plurality of extruded layers having different colors/shades spirally wound about a longitudinal axis to an outer surface to define the structure. The plurality of extruded layers include varying thicknesses along a spiral length of the plurality of layers and/or portions of the plurality of extruded layers encircling the longitudinal axis include portions disposed at different distances from the longitudinal axis. In some embodiments, the spirally winding includes forming a cylindrical structure, and pressing the cylindrical structure into a cuboid structure having a square or rectangular cross-section across the longitudinal axis and at least a portion of the plurality of extruded layers defining a square or rectangle pattern across the longitudinal axis. Longitudinal portions may be cut from the structures to form the products having a wood grain appearance.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a divisional of U.S. patent application Ser. No.15/295,607, filed Oct. 17, 2016, entitled “Products Having A Wood GrainAppearance, And Methods And Structures For Use In Forming Same,” theentire subject matter of which is incorporated herein by reference.

FIELD OF THE DISCLOSURE

The present disclosure relates generally to manufactured products, andmore particularly to products having a wood grain appearance, andmethods and structures for use in forming products having a wood grainappearance.

BACKGROUND

Traditionally, wood has been an attractive material for furnituredesign. Generally, wood does not stand up to outdoor use well in thelong term unless tropical hardwoods like Teak are used.

One attempt to make products that look like wood but that can stand upbetter to outdoor use compared to real wood includes applying a coatinghaving a wood grain appearance on to a substrate such as metal.

Another attempt to make products that look like wood but that can standup better to outdoor use compared to real wood includes profileextrusion and injection molding of a polymeric material and introducinga different color material before the extrusion or injection. Theintroduced different color material results in “streakers” that gave anouter surface having a simulated wood grain appearance.

SUMMARY

Shortcomings of the prior art are overcome and additional advantages areprovided through the provision, in one embodiment, of a structure foruse in forming a plurality of products having a wood grain appearance.The structure includes, for example, a plurality of extruded layershaving different colors/shades spirally wound about a longitudinal axisto an outer surface to define the structure. The plurality of extrudedlayers comprise varying thicknesses along a spiral length of theplurality of layers and/or portions of the plurality of extruded layersencircling the longitudinal axis comprising portions disposed atdifferent distances from the longitudinal axis.

In another embodiment, a structure for use in forming a plurality ofproducts having a wood grain appearance, includes for example, aplurality of overlapping layers comprising different colors/shades todefine said structure, and wherein said plurality of overlapping layerscomprises at least some of said plurality of layers having varyingcross-sectional thicknesses along a length of said plurality of layersand/or comprises at least some of said plurality of overlapping layerscomprising portions disposed at different cross-sectional locationsalong a length of said plurality of layers.

In another embodiment, a method for forming a structure for use informing products having a wood grain appearance is provided. The methodincludes, for example, extruding a plurality of layers having differentcolors/shades, and spirally winding the extruded plurality of layersabout a longitudinal axis outwardly to an outer surface to define thestructure.

In another embodiment, a cuboid structure for use in forming a pluralityof products having a wood grain appearance is provided. The cuboidstructure includes, for example, a plurality of layers overlaying eachother and wound about a longitudinal axis a plurality of times outwardlyto an outer surface to define the cuboid structure. The plurality oflayers include different colors/shades.

In another embodiment, a structure for use in forming a plurality ofproducts having a wood grain appearance is provided. The structureincludes, for example, three or more layers overlaying each other andwound about a longitudinal axis a plurality of times outwardly to anouter surface to define the structure. The three or more layers includea first layer having a first thickness and a first color/shade, a secondlayer having a second thickness and a second color/shade, and a thirdlayer having a third thickness and a third color/shade. The firstcolor/shade is lighter than the second color/shade and is lighter thanthe third color/shade.

In another embodiment, a method for forming a structure for use informing products having a wood grain appearance is provided. The methodincludes, for example, assembling a plurality of layers overlaying eachother and wound about a longitudinal axis a plurality of times to anouter surface to define the structure. The plurality of layers includesdifferent colors/shades.

In another embodiment, a method for forming a structure for use informing products having a wood grain appearance is provided. The methodincludes, for example, assembling three or more layers overlaying eachother and wound about a longitudinal axis a plurality of times outwardlyto an outer surface to define the structure. The three or more layersinclude a first layer having a first thickness and a first color/shade,a second layer having a second thickness and a second color/shade, and athird layer having a third thickness and a third color/shade. The firstcolor/shade is lighter than the second color/shade and is lighter thanthe third color/shade.

BRIEF DESCRIPTION OF THE DRAWINGS

The subject matter which is regarded as the disclosure is particularlypointed out and distinctly claimed in the concluding portion of thespecification. The disclosure, however, may best be understood byreference to the following detailed description of various embodimentsand the accompanying drawings in which:

FIG. 1 are perspective views of products formed having a wood grainappearance according to an embodiment of the present disclosure;

FIGS. 2-5 is a diagrammatic illustration of a method for forming aproduct having a wood grain appearance according to an embodiment of thepresent disclosure;

FIGS. 6 and 7 are diagrammatic illustrations of a method for use informing structures for forming products having a wood grain appearanceaccording to an embodiment of the present disclosure;

FIG. 8 is a diagrammatic illustration of an apparatus for formingstructures for use in forming products having a wood grain appearanceaccording to an embodiment of the present disclosure;

FIG. 9 is a diagrammatic illustration of an apparatus for formingstructures for use in forming products having a wood grain appearanceaccording to an embodiment of the present disclosure;

FIG. 10 is a diagrammatic illustration of a coextruder for formingstructures for use in forming products having a wood grain appearanceaccording to an embodiment of the present disclosure;

FIG. 11 is a diagrammatic illustration of a coextruder for formingstructures for use in forming products having a wood grain appearanceaccording to an embodiment of the present disclosure;

FIG. 12 is a diagrammatic illustration of a controller for use informing structures for use in forming products having a wood grainappearance according to an embodiment of the present disclosure;

FIG. 13 is a flowchart of a method for forming a structure for use informing products having a wood grain appearance according to anembodiment of the present disclosure;

FIG. 14 is a flowchart of a method for forming structures for use informing products having a wood grain appearance according to anembodiment of the present disclosure;

FIG. 15 is a flowchart of a method for forming products having a woodgrain appearance according to an embodiment of the present disclosure;

FIG. 16 is a flowchart of a method for forming structures for use informing products having a wood grain appearance according to anembodiment of the present disclosure;

FIG. 17 is a flowchart of a method for forming products having a woodgrain appearance according to an embodiment of the present disclosure;and

FIG. 18 is a perspective views of articles of manufacture formed fromproducts having a wood grain appearance according to embodiments of thepresent disclosure.

DETAILED DESCRIPTION

The present disclosure and certain features, advantages, and detailsthereof, are explained more fully below with reference to thenon-limiting embodiments illustrated in the accompanying drawings.Descriptions of well-known materials, fabrication tools, processingtechniques, etc., are omitted so as to not unnecessarily obscure thedisclosure in detail. It should be understood, however, that thedetailed description and the specific examples, while indicatingembodiments of the present disclosure, are given by way of illustrationonly, and are not by way of limitation. Various substitutions,modifications, additions and/or arrangements within the spirit and/orscope of the underlying concepts will be apparent to those skilled inthe art from this disclosure. Reference is made below to the drawings,which are not drawn to scale for ease of understanding, wherein the samereference numbers used throughout different figures designate the sameor similar components.

FIG. 1 illustrates a plurality of products 100 having a wood grainappearance according to an embodiment of the present disclosure.Products 100 may have outer surfaces and ends having a wood grainappearance and in which the wood grain appearance also extends throughthe product itself. As described further below, employing two or moredifferent colored materials allows for forming products having a woodgrain appearance. In some embodiments, the products may be formed frompolymeric or plastic materials. As described further below, employingtwo or more different colored polymeric or plastic materials allows forrealistic products having a wood grain appearance. For example, products100 may be boards, panels, sheets, veneers, and/or other productshaving, for example, a width, a length, and a thickness, an/or otherconfiguration. Such boards, panels, sheets, veneers, and/or otherproducts may be readily used and assembled in the fabrication ofarticles of manufacture such as outdoor furniture. As described below,forming structures having wound layers of different color layers,different thickness, and/or varying locations and thicknesses of thewound layers may allow for forming products having a more realistic woodgrain appearance.

FIGS. 2-5 diagrammatically illustrate a method for forming products(such as products 100 as shown in FIG. 1) having a wood grain appearanceaccording to an embodiment of the present disclosure.

With reference to FIG. 2, a structure 10 for use in forming productshaving a wood grain appearance may include a plurality of layers 20 and30 overlaying each other and wound, such as spirally wound, about alongitudinal axis L1 of structure 10 outwardly to an outer surface 12.In some embodiments, structure 10 may be formed from a plurality oflayers of polymeric material such as a plurality of layers of extrudedpolymeric materials. Structure 10 may be initially formed and shapedinto a cylinder or an elongated cylindrical structure having a circularcross-section. As illustrated in FIG. 2, plurality of layers 20 and 30may include different colors/shades and the same or differentthicknesses. For example, layer 30 may have a thickness T1, and layer 20may have a thickness T2. Thickness T2 may be greater than thickness T1.Layer 20 may be a lighter color/shade than the color/shade of layer 30.

As shown in FIG. 3, cylindrical structure 10 (FIG. 2) may be formed intoa cuboid structure 50 having a plurality of layers 60 and 70 overlayingeach other and disposed about a longitudinal axis L2 of structure 50outwardly to an outer surface 52.

For example, cuboid structure 50 may be an elongated cuboid structuresuch as a rectangular cuboid structure having a square or rectangularcross-section across longitudinal axis L2. Cylindrical structure 10(FIG. 2) may be pressed or placed in a mold to form cuboid shapedstructure 50. As shown in FIG. 3, an encircling portion of one of thewound layers disposed around longitudinal axis L2 of layers 60 and 70may be disposed at varying positions, locations, and distances relativeto longitudinal axis L2. For example, an encircling portions of thewound layers around longitudinal axis L2 of layers 60 and 70 may have asquare or rectangular pattern or configuration, e.g., the outer spiralwound layers may have square or rectangular pattern or configurations.

Cylindrical structure 10 (FIG. 2) and cuboid structure 50 may be formedfrom a heated polymeric or plastic layers of materials such as extrudedlayers of material. Upon cooling, cuboid structure 50 may cool atdifferent rates throughout its thickness. For example, the corners maycool faster than the center of the cuboid structure resulting inportions of the sides of the cuboid structure extending inward relativeto the corners and forming a cuboid structure 90 as shown in FIG. 4.Such an effect due to the unequal or irregular cooling may impartrandomness in the position, location, or distance of the wound layersrelative to the longitudinal axis, which randomness may result inproducts having a more realistic wood grain appearance. As shown in FIG.4, portions of the layers through the thickness may curve inwardlytoward a longitudinal axis L3.

FIG. 5 illustrates a portion 92 operably longitudinally cut from cuboidshaped structure 90 (FIG. 4) along with a remainder portion 91 of thecuboid shaped structure. For example, one or more cut portions may beproducts such as boards, panels, sheets, veneers, and/or other products.As will be appreciated, such products have outer surfaces and endshaving a wood grain appearance and a wood grain appearance extendingthrough the product. Thus, if the cut products are subsequently planed,sanded, further cut, or otherwise processed, the planed, sanded, furthercut, or processed surfaces would still be provided with outer surfaceshaving a wood grain appearance.

FIGS. 6 and 7 diagrammatically illustrate a method for use in formingstructures for forming products having a wood grain appearance accordingto an embodiment of the present disclosure. For example, as shown inFIG. 6, a structure 110 for use in forming products having a wood grainappearance may include a plurality of layers 120 and 130 overlaying eachother and wound, such as spirally wound, about a longitudinal axis L4 ofstructure 110 outwardly to an outer surface 112. Structure 110 may bethe same as structure 10 (FIG. 2) such as formed from a heated polymericor plastic layers of materials such as extruded layers of material.

A plurality of rams 150 may be operably employed of deform structure 110to impart variations in the location and/or position of the layerswithin structure 110. For example, rams 150 may be various guided piecesfor exerting pressure or for driving or forcing structure 110 by impact.The plurality of rams 150 may initially act on a side of the structure,the structure may be turned or the rams moved to act on a different sideof the structure. In another embodiment, a plurality of rams may bedisposed, for example, for acting on 2 or 4 sides of the structure atthe same time or at different times.

FIG. 7 illustrates a structure 170 formed employing the rams 150 (FIG.6) and cooled. Each spiral of layers in structure 10 (FIG. 2) andstructure 110 (FIG. 6) generally remain at constant longitudinaldistances, locations and/or positions relative to longitudinal axis L1and longitudinal axis L4, respectively. As will be appreciated, thelayers in structure 170 are disposed at varying longitudinal locationsand/or positions relative to a longitudinal axis L5. Such varyinglocations and/or positions of the layers, when cut, result in productshaving a more varied and realistic wood grain appearance. As describedbelow, a thickness of the spiral wound layers may be varied in adirection of the spiral, and/or a force applied by the rams onto astructure may be varied or randomly controlled, and/or the longitudinalposition of the rams varied or randomly controlled, to cause a morerandom pattern or disruption of the locations and/or positions of thespiral wound layers throughout a structure. It will be appreciated thatother processes may be employed to impart deformation or deflection ofthe layers within a structure.

FIG. 8 diagrammatically illustrates an apparatus 200 for formingstructures for use in forming products having a wood grain appearanceaccording to an embodiment of the present disclosure. Apparatus 200 mayinclude a first extruder 210 and a second extruder 220, which feedmaterial onto a first roller 240 and a second roller 250. The extrudersmay be disposed one on top of another. For example, first extruder 210may extrude a first layer 212, and second extruder 220 may extrude asecond layer 222. Second layer 222 may be received on first layer 212.Rollers 240 and 250 may receive the overlapping extruded layers and formor continuously wind the extruded layers into a spirally wound roll 260.Rollers 240 and 250 may be movable away from each other, e.g., roller250 may move in the direction of arrow R as roll 260 is being formed.The plurality of layers may have different colors/shades and differentthicknesses.

FIG. 9 diagrammatically illustrates an apparatus 300 for formingstructures for use in forming products having a wood grain appearanceaccording to an embodiment of the present disclosure. Apparatus 300 mayinclude a first extruder 310, a second extruder 320, and a thirdextruder 330, which extruders feed material between a nip of a firstroller 370 and a second roller 380. The extruders may be disposed one ontop of another. For example, first extruder 310 may extrude a firstlayer 312, second extruder 320 may extrude a second layer 322, and thirdextruder 330 may extrude a third layer 332. Second layer 322 may bereceived on first layer 312, and third layer 332 may be received onsecond layer 322. Rollers 370 and 380 may compress and reduce thethickness of the three extruded layers, which may aid in bonding thelayers together. Also the width of the extrude layers may increase afterpassing through the nip of rollers 370 and 380. Rollers 340 and 350 mayreceive the three overlapping compressed extruded layers and form orcontinuously wind the extruded layers into a spiral wound roll 360. Theplurality of layers may have different colors and different thicknesses.It will be appreciated that more than three extruders may be employed informing a structure for use in forming products such as products havinga wood grain appearance.

FIG. 10 diagrammatically illustrates a coextruder 480 for operablyextruding a plurality of layers 482 and 484. FIG. 11 diagrammaticallyillustrates a coextruder 490 for operably extruding a plurality oflayers 492, 494, and 496. Coextruders 480 and 490 may be operablyemployed in the apparatus shown in FIGS. 8 and 9.

FIG. 12 illustrates a computing unit or controller 500 that may beemployed in a method for forming structures for use in forming productshaving a wood grain appearance according to an embodiment of the presentdisclosure. For example, controller 500 may be operably employed inapparatus 200 (FIG. 8), apparatus 300 (FIG. 9), coextruder 480 (FIG.10), coextruder 490 (FIG. 11), and/or in control of rams 150 (FIG. 6).Controller 500 may be any type of computing unit or controller having aprocessor 510, a memory 520 and input/output devices 530. For example,controller 500 may variably or randomly control the thicknesses of theextrusions of the various layers as the layers are extruded and/or thedeformation of the spiral wound structures so that the spiral layers inthe structure may be varied or randomly varied in the direction of thespiral, and relative to the longitudinal axis to cause a more randompattern of the locations and/or positions of the spiral wound layersthroughout the structure. Typically, the thickness of initial extrusionsare not constant and often form waste. However, in accordance with thepresent disclosure, such initial extrusions may be desirable inresulting in products having a more random appearance.

In some embodiments, the first layer may be the thickest and have thelightest color/shade representing the high growth phase of a tree in thespring. The second layer may have a medium color/shade that representsthe slowing growth phase of the early to mid-summer, and the third layermay have a dark color/shade that represent the slow growth phase of thelate summer and fall months. As illustrated in FIG. 9, the plurality oflayers 312, 322, and 332 may include different colors/shades anddifferent thicknesses. For example, layer 312 may have a thickness T1′,layer 322 may have a thickness T2′, and layer 332 may have a thicknessT3′. Thickness T1′ may be greater than thickness T2′ and greater thanthickness T3′. Layer 312 may be a lighter color/shade than layer 322 andlayer 332.

The combined thickness of the layers may be about ⅛ inch (about 3.2millimeters) to about 1 inch (about 25.4 millimeters), about ⅛ inch(about 3.2 millimeters) to about ¾ inch (about 19.1 millimeters), about⅛ inch (about 3.2 millimeters) to about ½ inch (about 12.7 millimeters),about ⅛ inch (about 3.2 millimeters) to about ⅜ inch (about 9.5millimeters), about ⅛ inch (about 3.2 millimeters), about ¼ inch (about6.4 millimeters), about ⅜ inch (about 9.5 millimeters), about ½ inch(about 12.7 millimeters), about ¾ inch (about 19.1 millimeters), about 1inch (about 25.4 millimeters), or other suitable thickness. The lightestcolor/shade of the layers may have a thickness of about 1/16 inch (about1.6 millimeters) to about 3/16 inch (about 4.8 millimeters), about ⅛inch (about 1.3 millimeters), or other suitable thickness. The mediumand dark colors/shades of the layers may have a thickness of about 0.025inch (about 0.6 millimeters) to about 0.075 inch (about 2 millimeters),about 0.05 inch (about 1.3 millimeters), or other suitable thickness.

As the spirally wound layers are generally thin compared to the overalldimensions of the roll produced, the spirally wound layers provide arealistic appearance of wood having annular tree rings in products cutfrom the roll. It will be appreciated that the technique of the presentdisclosure may be operable with only two layers having different colorsand the same or different thicknesses. For example, one layer beingthicker and having a light color/shade, and the other layer beingthinner and having a darker color/shade. It will be appreciated that thetechnique of the present disclosure may be operable with three or morelayers of different colors/shades and/or thicknesses. For example, onelayer may be thicker and have a lighter color/shade compared to the twoor more other layers having a thinner and darker color/shade. Thecolors/shades of the layers may be brown, red, yellow, gray, orange thatrepresent natural wood grain colors/shades. Other colors/shades may beemployed such as blue, green, purple, fluorescent, or other colors thatmay represent wood grain products being stained or painted.

In some embodiments, an apparatus according to the present disclosuremay be operable to roll a multicolored sheet (e.g., formed from two,three or more layers) of polymeric or plastic material such as about ¼inch (about 6.4 millimeters) thick and about 8 feet wide or more into alarge roll of perhaps about 6 feet in diameter to about 8 feet indiameter as it exits the extruder so that the layers bond or weldtogether.

Once the roll reaches a suitable diameter, the roll may be cut and movedoff line so a new roll may be started. The removed cylindrical roll maystill be at an elevated temperature and may be moved into a press whichpress may compress the roll from two directions forcing it into a cuboidstructure.

As will be appreciated, squaring up of the cylindrical roll reduceswaste as portions of the cuboid shaped structure are later cut intoproducts such as boards, panels, sheets, veneers, and/or other products.As will also be appreciated, forming the cylindrical roll in to a cuboidshaped structure imparts variability in the layers so that the cutboards, panels, sheets, veneers, and/or other products have are morerandom and natural looking and less regular wood grain pattern. Thecombination of reshaping and the uneven cooling rates of the outsideedges and ends compared to the center of the cuboid shaped structure maycreate variability in the layers, and may make the subsequent cutboards, panels, sheets, veneers, and/or other products having a moreinteresting and realistic wood grain appearance.

In other embodiments, a plurality of layers overlaying each other andspirally wound about a longitudinal axis of structure outwardly to anouter surface may be formed directly into a cuboid structure, e.g.,without first forming a cylindrical structure. For example, theplurality of layers may be initially operably formed having flat sidesdisposed 90 degrees from each other, which flat sides are maintained asthe cuboid structure is formed. In other embodiments, a formed solidmandrel may have an innermost spiral of the layers, which formed solidmandrel is used to form the remaining portion of the roll.

After the cuboid shaped structure is completely cooled, it can be storedfor any length of time. As orders are received, boards, panels, sheets,veneers, and/or other products may be cut or sliced having any desiredthickness using, for example, a band saw. The cut boards, panels,sheets, veneers, and/or other products may then be run through a planeror bed sanders for the desired surface finish. Cut boards may have athickness corresponding to standard or full size boards such as ½ inch,⅝ inch, ¾ inch, 1 inch, 1¼ inches, 1½ inches, 2 inches, 3 inches, and 4inches, and other suitable sizes. In addition, the technique of thepresent disclosure may allow for forming a 6 foot square having a treetrunk appearance. It will be appreciated that the two outermostlongitudinal cuts may be waste since the outside surface on one side ofthe boards, panels, sheets, veneers, and/or other products would nothave a wood grain appearance. The step of squaring up the cuboid shapedstructure may allow for subsequent accurate band sawing.

In some embodiments, the layers may be formed from high-densitypolyethylene (HDPE) thermoplastic or other suitable polymeric or plasticmaterials.

In addition, in other embodiments, the layers may be formed frommaterial for making medium-density fiberboard (MDF) such as wood fiberswith a binder and forming the structure such the cuboid shaped structureby applying high temperature and pressure. The wood fibers may havedifferent colors/shades. For example, the wood fibers for the differentlayers may be stained to have different colors/shades. Such an MDFproduct according to the present disclosure may be manufactured intoproducts having outer surfaces with a wood grain appearance therebyeliminating the need to apply an attractive laminated top surface orveneer compared to conventional MDF products.

In the above embodiments, the layers may be continuous layers ornon-continuous layers, or combinations thereof. The layers may besecured or bonded to each other prior to forming into a roll and/or uponforming into a roll. The spirally wound structure may be a tightly woundspiral structure, e.g. cylindrical structure and/or cuboid structurewith little or no air pockets between the layers. While the spirallywound structure may be longitudinally cut to form products having a woodgrain appearance, it will be appreciated that the spirally woundstructure may be cut on an angle relative to the longitudinal axis ofthe structure such as at about 5 degrees to about 20 degrees, at about 5degrees to about 10 degrees, at about 3 degrees, at about 5 degrees, atabout 10 degrees, at about 15 degrees, at about 20 degrees, or at otherangles, or across the longitudinal axis, which will provide productshaving different wood grain appearances. The layers may have no fibersor contain fibers.

The structures for forming products having a wood grain appearance maybe formed from heated extruded materials as noted above. In otherembodiments, the overlapping layers may be resilient sheets. Theresilient sheets may be at room temperature or may be heated above roomtemperature to provide increase flexibility. The overlapping layers orsheets may be bonded to each other such as by thermal bonding, adhesivebonding, or other suitable bonding. The formed resilient overlappinglayers or sheets may be rolled into a cylindrical or cuboid structurewith the overlapping portions thermally bonded, adhesively bonded, orother suitable bonding. In other embodiments, the separate resilientlayers may be wound and secured to each other by thermally bonding,adhesive bonding, or other suitable bonding. In some embodiments, wherean adhesive is employed to bond the layers together, the thickness ofthe adhesive between the layers may be such that the adhesive is so thinthat it is barely or not visible to an observer in the products having awood grain appearance, e.g., the adhesive may not represent a growthphase of the rings of a tree. In other embodiments, the adhesive mayhave a sufficient thickness and color operable to be visible to anobserver in the products having a wood grain appearance, e.g., theadhesive represents a growth phase of the rings of a tree.

FIG. 13 illustrates a method 600 for forming a structure for use informing products having a wood grain appearance according to anembodiment of the present disclosure. For example, method 600 mayinclude at 610 extruding a plurality of layers having differentcolors/shades, and at 620 spirally winding the extruded plurality oflayers about a longitudinal axis outwardly to an outer surface to definea structure.

FIG. 14 illustrates a method 700 for forming a structure for use informing products having a wood grain appearance according to anembodiment of the present disclosure. For example, method 700 mayinclude at 710 assembling a plurality of layers overlaying each otherand wound about a longitudinal axis a plurality of times outwardly to anouter surface to define the structure in which the plurality of layershave different colors/shades.

FIG. 15 illustrates a method 800 for forming products having a woodgrain appearance according to an embodiment of the present disclosure.For example, method 800 may include at 810 assembling a plurality oflayers overlaying each other and wound about a longitudinal axis aplurality of times outwardly to an outer surface to define thestructure, and at 820 cutting longitudinal portions from the structureto form the products having outer longitudinal surfaces having a woodgrain appearance.

FIG. 16 illustrates a method 900 for forming a structure for use informing products having a wood grain appearance according to anembodiment of the present disclosure. For example, method 900 mayinclude at 910 assembling three or more layers overlaying each other andwound about a longitudinal axis a plurality of times outwardly to anouter surface to define the structure, and wherein the three or morelayers include a first layer having a first thickness and a firstcolor/shade, a second layer having a second thickness and a secondcolor/shade, a third layer having a third thickness and a thirdcolor/shade, and the first color/shade is lighter than the secondcolor/shade and is lighter than the third color/shade.

FIG. 17 illustrates a method 1000 for forming a structure for use informing products having a wood grain appearance according to anembodiment of the present disclosure. For example, method 1000 mayinclude at 1010 assembling three or more layers overlaying each otherand wound about a longitudinal axis a plurality of times outwardly to anouter surface to define the structure, and wherein the three or morelayers include a first layer having a first thickness and a firstcolor/shade, a second layer having a second thickness and a secondcolor/shade, a third layer having a third thickness and a thirdcolor/shade, and the first color/shade is lighter than the secondcolor/shade and is lighter than the third color/shade, and at 1020cutting longitudinal portions from the structure to form the productshaving outer longitudinal surfaces having a wood grain appearance.

FIG. 18 illustrates articles of manufacture formed from products havinga wood grain appearance according to embodiments of the presentdisclosure (the articles of manufacture not being illustrated as havinga wood grain appearance for ease of illustration in FIG. 18). Forexample, the cut portions of the structure may be manufactured intofurniture which may include seats, chairs, benches, or tables. Otheruseful articles of manufacture may include decks, marine products,paneling, and other suitable articles of manufacture.

Advantages of the technique of the present disclosure includes formingdimensionally stable boards, panels, sheets, veneers, and/or otherproducts having realistic outer surfaces having a wood grain appearanceand realistic wood grain along cut end portions of the boards, panels,sheets, veneers, and/or other products. Such an approach provides a morerealistic looking wood products compared to conventional extrusionshaving injected or added colors or streakers.

Such boards, panels, sheets, veneers, and/or other products, cut from alarge roll, may be thicker than forming thick extruded polymeric orplastic boards which shrink to such an extent making it impractical tomake extrusions that are very thick at all.

The present technique may employ existing manufacturing methods ofcoextruded sheets, and employ a rolling and forming process, followed bycutting process, to create a unique material product. This presentapproach overcomes the thickness limitations of extrusions by employingthin layers and building or forming the thin layers into a largerstructure. Traditional woodworking tools may be readily applied informing the structure into useful articles of manufacture.

From the present description, products having a wood grain appearancemay be formed from a cylindrical roll of the different layers. In otherembodiments, the extruded layers may be formed directly into a cuboidshaped structure.

It is to be understood that the above description is intended to beillustrative, and not restrictive. For example, the above-describedembodiments and/or aspects thereof may be used in combination with eachother. In addition, many modifications may be made to adapt a particularsituation or material to the teachings of the various embodimentswithout departing from their scope.

While the dimensions and types of materials described herein areintended to define the parameters of the various embodiments, they areby no means limiting and are merely exemplary. Many other embodimentswill be apparent to those of skill in the art upon reviewing the abovedescription. The scope of the various embodiments should, therefore, bedetermined with reference to the appended claims, along with the fullscope of equivalents to which such claims are entitled.

In the appended claims, the terms “including” and “in which” are used asthe plain-English equivalents of the respective terms “comprising” and“wherein.” Moreover, in the following claims, the terms “first,”“second,” and “third,” etc. are used merely as labels, and are notintended to impose numerical requirements on their objects. Further, thelimitations of the following claims are not written inmeans-plus-function format and are not intended to be interpreted basedon 35 U.S.C. § 112, sixth paragraph, unless and until such claimlimitations expressly use the phrase “means for” followed by a statementof function void of further structure.

It is to be understood that not necessarily all such objects oradvantages described above may be achieved in accordance with anyparticular embodiment. Thus, for example, those skilled in the art willrecognize that the systems and techniques described herein may beembodied or carried out in a manner that achieves or optimizes oneadvantage or group of advantages as taught herein without necessarilyachieving other objects or advantages as may be taught or suggestedherein.

While the disclosure has been described in detail in connection withonly a limited number of embodiments, it should be readily understoodthat the disclosure is not limited to such disclosed embodiments.Rather, the disclosure can be modified to incorporate any number ofvariations, alterations, substitutions, or equivalent arrangements notheretofore described, but which are commensurate with the spirit andscope of the disclosure. Additionally, while various embodiments of thedisclosure have been described, it is to be understood that aspects ofthe disclosure may include only some of the described embodiments.Accordingly, the disclosure is not to be seen as limited by theforegoing description, but is only limited by the scope of the appendedclaims.

1. A structure for use in forming a plurality of products having a woodgrain appearance, said structure comprising: a plurality of extrudedlayers comprising different colors/shades spirally wound about alongitudinal axis to an outer surface to define said structure; andwherein said plurality of extruded layers comprise varying thicknessesalong a spiral length of said plurality of layers and/or portions ofsaid plurality of extruded layers encircling said longitudinal axiscomprising portions disposed at different distances from saidlongitudinal axis.
 2. The structure of claim 1 wherein said plurality ofextruded layers comprise varying thicknesses along said spiral length ofsaid plurality of layers and said portions of said plurality of extrudedlayers encircling said longitudinal axis comprising portions disposed atdifferent distances from said longitudinal axis.
 3. The structure ofclaim 1 wherein said structure comprises a cylindrical structure.
 4. Thestructure of claim 1 wherein said structure comprises a cuboid structureand said outer surface defining a square or a rectangular cross-sectionacross said longitudinal axis, and at least portions of said pluralityof extruded layers defining a square or rectangle pattern across saidlongitudinal axis.
 5. The structure of claim 1 wherein portions of someof said plurality of extruded layers curve inwardly toward saidlongitudinal axis.
 6. The structure of claim 1 wherein said plurality oflayers comprises first and second extruded layers, said first extrudedlayer comprising a first thickness and a first color/shade, said secondextruded layer comprising a second thickness and a second color/shade,said first thickness being greater than said second thickness, and saidfirst color/shade being lighter than said second color/shade.
 7. Thestructure of claim 1 wherein said plurality of layers comprises first,second, and third extruded layers, said first extruded layer comprisinga first thickness and a first color/shade, said second extruded layercomprising a second thickness and a second color/shade, said thirdextruded layer comprising a third thickness and a third color/shade,said first thickness being greater than said second thickness andgreater than said third thickness, and said first color/shade beinglighter than said second color/shade and said third color/shade.
 8. Thestructure of claim 1 wherein said plurality of extruded layers comprisesa thickness of about ¼ inch, and one of said plurality of extrudedlayers comprises a thickness of about ⅛ inch.
 9. The structure of claim1 wherein said plurality of extruded layers comprises a plurality ofextruded layers of polymeric material.
 10. The structure of claim 1wherein said plurality of extruded layers comprises a plurality ofextruded wood fibers with a binder.
 11. A product having a wood grainappearance, said product comprising: a portion cut longitudinally fromsaid structure of claim
 1. 12. An article of manufacture comprising: aplurality of portions cut longitudinally from one or more of saidstructure of claim 1 assembled into said article of manufacture.
 13. Thearticle of manufacture of claim 12 wherein said article of manufacturecomprises a seat, a chair, a bench, or a table.
 14. A structure for usein forming a plurality of products having a wood grain appearance, saidstructure comprising: a plurality of overlapping layers comprisingdifferent colors/shades to define said structure; and wherein saidplurality of overlapping layers comprises at least some of saidplurality of layers having varying cross-sectional thicknesses along alength of said plurality of layers and/or comprises at least some ofsaid plurality of overlapping layers comprising portions disposed atdifferent cross-sectional locations along a length of said plurality oflayers.
 15. The structure of claim 14 wherein said at least some of saidplurality of layers comprises varying cross-sectional thicknesses alongsaid length of said plurality of layers and said at least some of saidportions of said plurality of layers comprising portions disposed atdifferent cross-sectional locations along said length of said pluralityof layers.
 16. The structure of claim 14 wherein said structurecomprises a cylindrical structure.
 17. The structure of claim 14 whereinsaid structure comprises said plurality of overlapping layers spirallywound about a longitudinal axis to an outer surface to define saidstructure.
 18. The structure of claim 14 wherein said plurality ofoverlapping layers comprises a plurality of extruded overlapping layers.19. The structure of claim 14 wherein said structure comprises a cuboidstructure and said outer surface defining a square or a rectangularcross-section across a longitudinal axis, and at least portions of saidplurality of layers defining a square or rectangle pattern across saidlongitudinal axis.
 20. The structure of claim 17 wherein portions ofsome of said plurality of layers curve inwardly toward said longitudinalaxis.
 21. The structure of claim 14 wherein said plurality of layerscomprises first and second layers, said first layer comprising a firstthickness and a first color/shade, said second layer comprising a secondthickness and a second color/shade, said first thickness being greaterthan said second thickness, and said first color/shade being lighterthan said second color/shade.
 22. The structure of claim 14 wherein saidplurality of layers comprises first, second, and third layers, saidfirst layer comprising a first thickness and a first color/shade, saidsecond layer comprising a second thickness and a second color/shade,said third layer comprising a third thickness and a third color/shade,said first thickness being greater than said second thickness andgreater than said third thickness, and said first color/shade beinglighter than said second color/shade and said third color/shade.
 23. Thestructure of claim 14 wherein said plurality of layers comprises athickness of about ¼ inch, and one of said plurality of layers comprisesa thickness of about ⅛ inch.
 24. The structure of claim 14 wherein saidplurality of layers comprises a plurality of layers of polymericmaterial.
 25. The structure of claim 14 wherein said plurality of layerscomprises a plurality of wood fibers with a binder.
 26. A product havinga wood grain appearance, said product comprising: a portion cutlongitudinally from said structure of claim
 14. 27. An article ofmanufacture comprising: a plurality of portions cut longitudinally fromone or more of said structure of claim 14 assembled into said article ofmanufacture.
 28. The article of manufacture of claim 27 wherein saidarticle of manufacture comprises a seat, a chair, a bench, or a table.